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Table 1 Demographics of risk factor analysis group, N = 75

From: Risk factors for rod fracture after posterior correction of adult spinal deformity with osteotomy: a retrospective case-series

Characteristics Index Value
Age Mean (St. D) 58.9 (12.9)
Gender: Female N (%) 50 (66.6 %)
     Male N (%) 25 (33.3 %)
Ethnicity: Caucasian N (%) 66 (88.0 %)
    Hispanic N (%) 4 (5.3 %)
    Refused N (%) 5 (6.7 %)
Previous spinal surgical intervention: N (%) 16 (21.3 %)
      Primary
      Reoperation N (%) 59 (78.7 %)
Body mass index (BMI) Mean (St. D) 26.7 (5.5)
Smoking status: Never smoker N (%) 31 (41.3 %)
         Ever smoker N (%) 36 (48.0 %)
        Not specified N (%) 8 (10.7 %)